| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1c3026bd5177f1c397fc6c388925ddf3 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03B21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B17-0663
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03B21-005 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03B21-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03B21-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03B21-28 |
| filingDate |
2004-07-01^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2006-04-04^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d9d831cff93f0b1e586cb602025bade2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b378895ff80518eb857cf69bc630f1f0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf164e16b26f402b5e2cff678ee98122 |
| publicationDate |
2006-04-04^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-7021770-B2 |
| titleOfInvention |
Rear projection optical system |
| abstract |
An oblique projection optical system for leading rays of light from a display surface on which an image is displayed to a projection surface in such a way that the ray of light from the center of the display surface is obliquely incident on the projection surface in order to project a magnified image of the image displayed on the display surface onto the projection surface includes a plurality of reflecting surfaces having a power. At least two of the reflecting surfaces have a free-form curved surface, and, of all the reflecting surfaces, the one closest to the projection surface has a negative power and at least one of the other has a positive power. Alternatively, in a rear projection optical system having a projection optical system for projecting an image displayed on a panel display surface onto a screen surface, the projection optical system includes at least four curved-surface reflecting mirrors. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8128238-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-202011001775-U1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100449350-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007285628-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009066919-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007165192-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7549775-B2 |
| priorityDate |
2000-02-07^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |